SsangYong: Engine Euro 4. Service manual — part 63
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN
40
DIAGNOSIS
ECU
Limp
Home
Mode
Immedi-
ately
Engine Stop
Delayed
Engine
Stop
Torque
Reduction
(max.50%)
Torque
Reduction
(max.20%)
New DTC
DTC
Trouble
Help
P1253
P1254
Minimum Rail Pressure
Control Malfunction (IMV
Fault)
Maximum Rail Pressure
Control Malfunction (IMV
Fault)
- Rail pressure faults: Too low
- Check the IMV wiring harness.
- Check the ECU wiring harness.
• Check the ECU pin #87 for open
and short.
- Check the high pressure fuel lines, fuel
rails and high pressure pipes for leaks.
- Check the rail pressure sensor.
• Supply voltage: 5 ± 0.1 V
• Output voltage at 1600 bar:
4.055 ± 0.125 V
• Output voltage at atmospheric
pressure: 0.5 ± 0.04 V
- Check the transfer pressure fuel
pressure lines.
• Check the fuel level in fuel tank.
Check the fuel system for air influx.
• Check the fuel filter specification.
- Check the IMV resistance: 5.44
Ω
• When out of specified value: re-
place high pressure pump and IMV
- Replace the ECU if required.
- Rail pressure faults: Too high
- Check the IMV wiring harness.
- Check the ECU wiring harness.
• Check the ECU pin #87 for open
and short.
- Check the high pressure fuel lines, fuel
rails and high pressure pipes for leaks.
- Check the rail pressure sensor.
• Supply voltage: 5 ± 0.1 V
• Output voltage at 1600 bar:
4.055 ± 0.125 V
• Output voltage at atmospheric
pressure: 0.5 ± 0.04 V
- Check the transfer pressure fuel
pressure lines.
• Check the fuel level in fuel tank.
Check the fuel system for air influx.
• Check the fuel filter specification.
- Check the IMV resistance: 5.44
Ω
• When out of specified value: re-
place high pressure pump and IMV
- Replace the ECU if required.
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN
41
DIAGNOSIS
ECU
BRAKE
ECU
TCU
A/BAG
TC
RK-STICS
FFH
R/SENSOR
FA
T
C
TGS-LEVER
P/TRUNK
CCCS
Limp
Home
Mode
Immedi-
ately
Engine Stop
Delayed
Engine
Stop
Torque
Reduction
(max.50%)
Torque
Reduction
(max.20%)
New DTC
DTC
Trouble
Help
P1256
P1257
Too Small Transfer
Pressure Fuel in Rail
Pressure System
Too Large Transfer
Pressure Fuel in Rail
Pressure System
- Rail pressure fault: IMV current trim
too high, drift.
- Check the IMV wiring harness.
- Check the ECU wiring harness.
• Check the ECU pin #87 for open
and short.
- Check the rail pressure sensor.
• Supply voltage: 5 ± 0.1 V
• Output voltage at 1600 bar:
4.055 ± 0.125 V
• Output voltage at atmospheric
pressure: 0.5 ± 0.04 V
- Check the transfer pressure fuel
pressure lines.
• Check the fuel level in fuel tank.
Check the fuel system for air influx.
• Check the fuel filter specification.
- Check the high pressure fuel system.
• Check the fuel rails and high
pressure pipes for leaks.
- Check the IMV resistance: 5.44
Ω
• When out of specified value: re-
place high pressure pump and IMV
- Replace the ECU if required.
- Rail pressure fault: IMV current trim
too high, drift.
- Check the IMV wiring harness.
- Check the ECU wiring harness.
• Check the ECU pin #87 for open
and short.
- Check the rail pressure sensor.
• Supply voltage: 5 ± 0.1 V
• Output voltage at 1600 bar:
4.055 ± 0.125 V
• Output voltage at atmospheric
pressure: 0.5 ± 0.04 V
- Check the transfer pressure fuel
pressure lines.
• Check the fuel level in fuel tank.
Check the fuel system for air influx.
• Check the fuel filter specification.
- Check the high pressure fuel system.
• Check the fuel rails and high
pressure pipes for leaks.
- Check the IMV resistance: 5.44
Ω
• When out of specified value: re-
place high pressure pump and IMV
- Replace the ECU if required.
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN
42
DIAGNOSIS
ECU
Limp
Home
Mode
Immedi-
ately
Engine Stop
Delayed
Engine
Stop
Torque
Reduction
(max.50%)
Torque
Reduction
(max.20%)
New DTC
DTC
Trouble
Help
P1258
P1259
Too Small High Pressure
Fuel in Rail Pressure
System
Too Large High Pressure
Fuel in Rail Pressure
System
- Rail pressure fault: IMV current trim
too high, drift.
- Check the IMV wiring harness.
- Check the ECU wiring harness.
• Check the ECU pin #87 for open
and short.
- Check the rail pressure sensor.
• Supply voltage: 5 ± 0.1 V
• Output voltage at 1600 bar:
4.055 ± 0.125V
• Output voltage at atmospheric
pressure: 0.5 ± 0.04 V
- Check the transfer pressure fuel lines.
• Check the fuel level in fuel tank.
Check the fuel system for air influx.
• Check the fuel filter specification.
- Check the high pressure fuel system.
• Check the fuel rails and high
pressure pipes for leaks.
- Check the IMV resistance: 5.44
Ω
• When out of specified value: re-
place high pressure pump and IMV
- Replace the ECU if required.
- Rail pressure fault: IMV current trim
too high, drift.
- Check the IMV wiring harness.
- Check the ECU wiring harness.
• Check the ECU pin #87 for open
and short.
- Check the rail pressure sensor.
• Supply voltage: 5 ± 0.1 V
• Output voltage at 1600 bar:
4.055 ± 0.125 V
• Output voltage at atmospheric
pressure: 0.5 ± 0.04 V
- Check the transfer pressure fuel lines.
• Check the fuel level in fuel tank.
Check the fuel system for air influx.
• Check the fuel filter specification.
- Check the high pressure fuel system.
• Check the fuel rails and high
pressure pipes for leaks.
- Check the IMV resistance: 5.44
Ω
• When out of specified value: re-
place high pressure pump and IMV
- Replace the ECU if required.
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN
43
DIAGNOSIS
ECU
BRAKE
ECU
TCU
A/BAG
TC
RK-STICS
FFH
R/SENSOR
FA
T
C
TGS-LEVER
P/TRUNK
CCCS
Limp
Home
Mode
Immedi-
ately
Engine Stop
Delayed
Engine
Stop
Torque
Reduction
(max.50%)
Torque
Reduction
(max.20%)
New DTC
DTC
Trouble
Help
P1260
Too high IMV Driving
Current
- Abnormal rail pressure, IMV
CURRENT TRIM TOO HIGH, DRIFT
- Check the IMV wiring harnesses.
- Check the ECU wiring harnesses.
• Check ECU's pin A76 for open
and short.
- Check the Rail pressure sensor.
• Supply voltage: 5 ± 0.1V
• Output voltage at 1600 bar:
4.055 ± 0.125V
• Output voltage at atmospheric
pressure: 0.5 ± 0.04V
- Check low-pressure fuel system.
• Check fuel in fuel reservoir and
air penetration.
• Check fuel filter's specification.
- Check high-pressure fuel system.
• Check fuel rail and high-
pressure pipe for leaks.
- Check IMV's resistance (5.44
Ω).
• If the resistance is out of
specification, replace the high-
pressure pump and IMV.
P1286
Low Resistance for Injec-
tor #1 wiring harness
- Out of range about wiring harness
resistance for Injector #1.
• Low: Less than 0.150
Ω
(injector circuit open)
- Check the injector #1 wiring
harness and electric isolation.
- Check the injector #1 wiring
harness for open circuit.
• If the pin in injector #1 is defective,
replace injector #1 and perform
C2I coding, then check again.
• If the pin in injector #1 is not
defective, check the ECU wiring
harness.
- Replace the ECU if required.
P1287
High Resistance for Injec-
tor #1 wiring harness
- Out of range about wiring harness
resistance for Injector #1.
• High: More than 0.573
Ω (injector
circuit short)
- Check the injector #1 wiring
harness and electric isolation.
- Check the injector #1 wiring
harness for short circuit.
• If the trouble still exists after
removing the injector connector,
replace injector #1 and perform
C2I coding, then check again.
• If the trouble is fixed after
removing the injector connector,
check the wiring harness
between ECU and injector.
- Replace the ECU if required.
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